Device for wet disintegration

ABSTRACT

A device for the wet disintegration of materials of low and medium hardness, such as chalk clay, marl and so forth wherein a rotor with beaters is made so that it combines a crushing action with a milling action to achieve the required degree of fineness. For this purpose, the rotor is provided with hinged forked beaters centrally located on the rotor and bracketed by circular beaters alternately fluted and supported on axles spaced from the rotor axis.

United States Patent 1 Sladkov 1 51 Jan. 30, 1973 [54] DEVICE FOR WET DISINTEGRATION [58] Field of Search ..24l/29, 75, 76, 78, 86,104, 241/134,135,136,138,140,152 R, 152 A, 154,156, 187, 188 R, 193,194

[56] References Cited UNITED STATES PATENTS 1,892,697 1/1933 Elzemeyer ct al. ..24l/l93 "snzggarai. "ET/153 1,424,922 Knittel ..241/1 93 Primary Examiner-R0bert L. Spruill Att0rneyWaters, Roditi, Schwartz and Nissen ABSTRACT A device for the wet disintegration of materials of low and medium hardness, such as chalk clay, marl and so forth wherein a rotor with beaters is made so that it combines a crushing action with a milling action to achieve the required degree of fineness. For this purpose, the rotor is provided with hinged forked beaters centrally located on the rotor and bracketed by circular beaters alternately fluted and supported on axles spaced from the rotor axis.

2 Claims, 2 Drawing Figures PATENTEDJAN 30 1975 3. 7 l 3, 59 7 SHEET 1 OF 2 PATENTEDJAN 30 1975 SHEET 2 BF 2 DEVICE FOR WET DISINTEGRATION The present invention relates to the devices for wet disintegration of materials with low and medium hardness, such as chalk, clay, marl, and so forth.

Up to the present time the materials mentioned above have been crushed and milled separately, i.e. first the lumps of the material have been crushed in crushers, then the crushed material has been milled in ball or other types of mills to the required degree of fineness. In such a process, the material has been conveyed from the crusher into the mill by special mechanisms.

This complicates the production process, and calls for the use of large production areas in view of the bulkiness of the equipment.

Besides, the end product, as a rule, has an insufficiently high quality because sometimes it has to be dried before being conveyed from the crusher into the mill which fact has an adverse effect on the quality of the articles manufactured from these materials.

As an example, in the manufacture of ceramic facing tiles, the tiles may be loose and insufficiently attractive in appearance.

An object of the invention resides in eliminating the aforesaid disadvantages.

A further object of the invention resides in providing a device which would allow the operations of wet crushing and milling to be combined in one installation.

These objects are accomplished by providing a device for the wet disintegration of materials of low and medium hardness, such as chalk, clay, marl, and so forth, wherein the working element is a rotor with movable beaters and a charging funnel is located on the casing of the device in the middle thereof, wherein according to the invention the rotor is provided at its ends with circular beaters mounted freely on longitudinal axles, while the middle part of the rotor, located under the charging funnel, has forked beaters hinged to the rotor.

Such a device allows very large lumps and pieces of chalk, marl, clay, and so forth to be crushed and disintegrated in a single installation to a size ranging from 1 to mm. Besides, the specific output of these installations increases by at least ten times while the power consumption is considerably reduced.

When handling materials which, combined with water, form very consistent and sticky mixtures (e.g. clay-like materials) or when it becomes necessary to disintegrate materials to a great fineness (IO- microns and smaller) it is preferred that part of the circular beaters should have a fluted cylindrical surface and be installed on the longitudinal axles so that the circular beaters with a fluted cylindrical surface would alternate with the circular beaters having a smooth cylindrical surface.

Given below is a detailed description of the invention by way of example with reference to the accompanying drawings in which:

FIG. 1 shows a device for the wet disintegration of materials with low and medium hardness according to the invention, partially broken away and partly in longitudinal-vertical section and;

FIG. 2 is a cross sectional view taken along line Il-II in FIG. 1.

The device comprises a casing 1 installed on supports 2, internally lined with smooth and fluted armor plates 3 and closed at the ends with covers 4 and 5. Installed inside the casing l on bearings 6 is a rotor 7 driven by an electric drive 8. Located on the casing l, in the middle, is a charging funnel 9. The rotor 7 is fitted with beaters of two types. On the middle part of the rotor 7, under the charging funnel 9 are installed forked beaters l0, suspended from the rotor 7 by means of hinges 11. These beaters are designed to crush large pieces and lumps of materials. At the ends, the rotor has circular beaters l2 installed on longitudinal axles 13 said axles being secured to discs 14 rigidly mounted on the shaft of the rotor 7. A half of the circular beaters 12 have smooth cylindrical surfaces while the other half of the beaters 12a have fluted surfaces. Both types of circular beaters l2 and are mounted on the axles 13 so that the beaters 12 with smooth cylindrical surfaces alternate with the beaters 12a having fluted cylindrical surfaces. The circular beaters 12 and 12a located at the ends of the rotor 7 are intended for milling the material which has already been crushed to the required fineness by the forked beaters 10. One of the casing walls has two rectangular openings closed by detachable sieves 15 with round or elongated holes of a size which is governed by the required fineness of disintegration. The casing l is provided with a pocket 16 for receiving the milled product, i.e. slurry, unloaded from the casing 1 through the holes in the sieves 15.

The slurry is either discharged from the pocket 16 by gravity or forced out through the branch pipe 17.

The bottom of the casing 1 has built-in traps 18 for non-crushable matter.

The device functions as follows:

The clumps and pieces of chalk, clay, marl, or the like are continuously fed into the charging funnel 9 wherefrom they pass into the central part of the casing l where the forked beaters 10 are located. As the rotor 7 rotates, the forked beaters crush the raw material to pieces which are 50-l00 mm in size. Owing to the fact that these beaters are made in the form of forks hinged to the rotor 7, crushing is sufficiently effective and reliable. Further, the crushed material is delivered by the an internally produced suction effect through the holes 19 in the fastening discs 14 of the rotor 7 into the side chambers formed by the discs 14 in the casing 1. Here the material is milled by means of the circular beaters 12 and 12a. The circular beaters intensify the sticking of the material while the circular beaters 12a, on the contrary, cut this material off the walls of the chamber in the casing 1. This contributes greatly to intensifying the milling of the material and is most advantageous when very consistent and sticky materials are being handled. The milled material is discharged through the holes in the sieves 15 into the pocket 16 wherefrom it is either removed by gravity or is forced out through the branch pipe 17.

The uncrushable objects settle on the bottom of the chamber of the casing l or are thrown by the rotor 7 into the traps 18 which are cleaned out periodically.

What we claim is:

1. A device for the wet disintegration of materials having a low or medium hardness, such as chalk, clay and marl or the like, comprising an elongate casing; a material charging funnel positioned on said casing generally centrally thereof; a horizontal rotor extending through said casing; a plurality of axially spaced discs mounted on said rotor, said discs defining an open central space and two relatively closed end chambers; a plurality of axially extending longitudinal axles located peripherally in said end chambers and being radially spaced about said rotor on either side of said charging funnel; circular beaters being positioned on each of said longitudinal axles; and fork-shaped heaters being hingedly suspended on said rotor in said central space below said charging funnel between said end chambers said discs being provided with holes whereby an inter- 

1. A device for the wet disintegration of materials having a low or medium hardness, such as chalk, clay and marl or the like, comprising an elongate casing; a material charging funnel positioned on said casing generally centrally thereof; a horizontal rotor extending through said casing; a plurality of axially spaced discs mounted on said rotor, said discs defining an open central space and two relatively closed end chambers; a plurality of axially extending longitudinal axLes located peripherally in said end chambers and being radially spaced about said rotor on either side of said charging funnel; circular beaters being positioned on each of said longitudinal axles; and fork-shaped beaters being hingedly suspended on said rotor in said central space below said charging funnel between said end chambers said discs being provided with holes whereby an internally produced suction effect in said chambers produces a flow of material from said central space into said end chambers.
 1. A device for the wet disintegration of materials having a low or medium hardness, such as chalk, clay and marl or the like, comprising an elongate casing; a material charging funnel positioned on said casing generally centrally thereof; a horizontal rotor extending through said casing; a plurality of axially spaced discs mounted on said rotor, said discs defining an open central space and two relatively closed end chambers; a plurality of axially extending longitudinal axLes located peripherally in said end chambers and being radially spaced about said rotor on either side of said charging funnel; circular beaters being positioned on each of said longitudinal axles; and fork-shaped beaters being hingedly suspended on said rotor in said central space below said charging funnel between said end chambers said discs being provided with holes whereby an internally produced suction effect in said chambers produces a flow of material from said central space into said end chambers. 